Pulsar pair ripples spacetime
Duo’s tightening orbits provide even stronger evidence for gravitational waves
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/121815_ag_pulsar_free.jpg?fit=860%2C460&ssl=1)
PULSAR PAIR A system of two radio beam–emitting pulsars locked in tight orbits, illustrated here, is an ideal test bed for measuring gravitational waves and other effects of general relativity.
© MPIfR, M. Kramer